I would like to install a 240V 30A outlet for EV charging in my deeded parking space in the common basement garage in my condominium building. The electrical closet with all individual unit electric meters is conveniently adjacent to my deeded parking space. Rather than drill a hole through a steel reinforced concrete floor from my unit into the garage to run a wire from my in-unit main breaker panel to the EV charging station, can I do the following: 1. install a new main breaker panel between the unit electric meter (in the electrical closet) and the in-unit breaker panel (thus making the in-unit breaker panel a subpanel); and 2. run a wire from the new main breaker panel (which would be physically located in the electrical closet in which the unit electric meter is located) to supply my 240V 30A EV charging station? The condominium is located in Cambridge, MA.
First you have to consult with your Condo HOA to see what their restrictions are and then proceed per their instructions. Otherwise your thinking about putting the mains by the meter and sub feeding your home panel and new charger is the least expensive and least intrusive of your options.